It sounds like she is just suggesting a possibility, not diagnosing you. I doubt that seeing other psychologists was a factor in this, unless she said it was specifically. Here a psychologist or psychiatrist can diagnose Autism, but few have the experience to do so. My therapist knew nothing about Asperger's before I saw her but she referred me to a psychologist for an evaluation and a psychiatrist to follow up. It's possible that she's totally wrong, you've only seen her twice, but what if she has experience your previous therapist didn't? Also some therapists don't believe in telling their clients what they think their diagnosis might be. Looking back I also think the therapist I saw when I was younger might have suspected but didn't say anything.

I think you should see her and ask why she thinks you could have Asperger's or Autism. The AQ screening test here on PC is not a perfect indication one way or another, also the female presentation of Aspereger's/Autism can be different, most material is based on males.